Type Method

predicateForObjectsFromSource:

Returns a predicate that matches all the objects that were created by the provided source.

Declaration

+ (NSPredicate *)predicateForObjectsFromSource:(HKSource *)source;

Parameters

source

The source that saved data into the HealthKit store. The source object represents either an app or a devices capable of saving data directly into the HealthKit store (for example, a linked Bluetooth heart rate monitor).

Return Value

A predicate that matches all the objects created by the provided source.

Discussion

Use this convenience method to create a predicate that finds all the objects from a specific app or device. The following sample uses both the convenience method and a predicate format string to create equivalent predicates.

NSPredicate *fromSource = [HKQuery predicateForObjectsFromSource:source];
 
NSPredicate *explicitFromSource = [NSPredicate predicateWithFormat:@"%K == %@",
                                   HKPredicateKeyPathSource,
                                   source];

See Also

Creating Object Predicates

+ predicateForObjectWithUUID:

Returns a predicate that matches an object with the specified universally unique identifier (UUID).

+ predicateForObjectsWithUUIDs:

Returns a predicate that matches the objects with the specified universally unique identifiers (UUIDs).

+ predicateForObjectsFromSources:

Returns a predicate that matches all the objects that were created by any of the provided sources.

+ predicateForObjectsFromDevices:

Returns a predicate that matches all the objects that were created by any of the provided devices.

+ predicateForObjectsWithDeviceProperty:allowedValues:

Returns a predicate that matches all objects created by devices with the specified properties.

+ predicateForObjectsFromSourceRevisions:

Returns a predicate that matches all the objects that were created by any of the provided source revisions.

+ predicateForObjectsWithMetadataKey:

Returns a predicate that matches any object whose metadata contains the provided key.

+ predicateForObjectsWithMetadataKey:allowedValues:

Returns a predicate that matches objects based on the provided metadata key and an array of target values.

+ predicateForObjectsWithMetadataKey:operatorType:value:

Returns a predicate that matches objects based on the provided metadata key, value, and operator.

+ predicateForObjectsWithNoCorrelation

Returns a predicate that matches all objects that are not associated with a HealthKit correlation.